Water-tube boiler.



W. D. HOXIE.

WATER TUBE BOILER.

APPLrcATloN man MAR. 23, 1914.

Patented Feb. 13, 1917.

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WATER TUBE BOILEH. APPLICATION FILED MAR. 23, 19m.v

llo Patented Feb. 13, 1917 3 SHEETS-SHEET 2.

` W. D. HOXIE.

WATER TUBE BOILER. APPLICATION FILED MAH. 23, 1914.

Patented Feb. 13, 1917.

3 SHEETS-SHEET 3.

@E SROGKLYN, NEW YORK, TO THE BABCUCK 'Wl't On BAYQNNE, NEW JERSEY, A*SORPGRATW GF DEEVJ JERSEY.

Waren-TUBE nonnina.

mamma-'scm Speccaton of Letters Patent.

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application filed March 23, 1914. Serial No. 826,546.

To oil @from may roeleert@ Be it known that lVrLLIAM D. Horns, a citizen of the. United States, residing in New Yoricity, borough oft Brooklyn, county ,of Kings, and State oli New York, have in rented certain new and useful improve: ments in lllaterflube Boilers, of which the folio-ring is a specification. H-llly invention relates more particularly in. to improvements in sectional or water tube boilers and although not limited to a Inarine boiler its primary utility will be in marine work. ln its main features the present boiler comprises a bank of generating tubes inclined upward from the front to the r So that the combustion space within furnace islowest at the front and highest at the rear portion. Such form of cornbustien chamber enables combustion to be completed before the gases come into conwith the heating surfaces.

another feature of the invention isthe employment ot a special form of tube by which am enabled toincrease the ratio oiE genera-ting surface to the combustion area, thereby improving the economy, and in connection therewith the employment of downcomers of greater diameter than the generating tubes and embedded in the side walls of the setting on bot-h sides of the generating tubes. These and other` features of the invention Will be understood by reference to the accompanying 'drawings in which Figure l is a longitudinal section o'l one e1nbodiinent of my invention; Fig. 2 a transverse section, Fig. 3 a side elevation of the downcomers; and Fig. Ll a longitudinal seotion ot a part of a boiler showing,r a modiiioation. Similar reference numerals indicate similar parts in the several views.

Referring to the drawings the numeral l designates a cylindrical steam drum made of one shell sheet and one tube sheet, the sheets being butt-jointed and secured with -double butt straps. The vi'ater drum 2 is made of one shell sheet and a ilanged tube sheet with the longitudinal se-.uns lapped, the tube sheet being flanged to form the out side lap. 'i'

The Steam and water drums are connected by a. bank of generating tubes 3 containing suiiicient generating surface for the particular boiler required. ln the drawings ll have shown nineteen horiaontalrows, all the tubes of which are curved at-both ends and are straight for the rest of their length, and enter the drains radially. The degree o'l cur- 'ature oi theJ lowermost 'tubes at their upper ends is substantially the same as that of the uppermost tubesat their lower ends, By curving the generating tubes in the inanner described l ain enabled to increase the ratio of `gtnierating surface to combustion area. Alsoas shown, tubes at the lower `part of the bank have their lower ends curved upwardly and those at the upper part of thc bank have their ends curved downwardly, and some of the tubes of the intermediate rows have reversely curved ends.

Also expanded into the drums on both sides of the generating tubes are downcomers l. (see-Fig. 3) oi' greater diameter than the generating tubes, curved at both ends and straight for the rest ot' their length, except are embedded in the asbestos lining` to insuw late them as much as possible from the furnace heat.

To direct the gases to the uptake end ot the tubes, and across the tubesfl employ a 'baille 'i supported on the. next to the bottoni ronv of tubes, said baille extending from the water drum touard the steam drum about t\vothirds the length of the tubes, and terminatingv short ot the curved section of the lowcrinost tubes. Supported upon the upper rou of tubes. as shown in lfig. i, is a .second longitudinal baille il tending;` from the steam drinn about tivothirds the length ot thev tubes and terminat ing short of the curved section of thc upper' most tubes and which baille also forms the roof ot the combustion chamber. From the ends of batlles 'i' and 8 cross balllcs 9 and l0, respectively, extend about halt'aray across the bank ot tubes, thus dividing the baul. into threetransverse passes beginning at the uptake end ot the tubes. The course of the gases is indicated by the arrows. the gases iinally escaping` through a vertical up* take ll. As shown, the bellies 9 and lO are l2, to enable them to be turned back to `heat to'assist in the combustion.

give access to the tubes For cleaning.

The space between the second and third rows ottubes from the bottom is greater than that between the other rows to provide a soot collecting space, the soot being removedthrough cleaning doors 13.

lt oil fired, any suitable oil burner or mechanical atomizer il may be eniployed. lt is located. as shown in Fig. l, to inject the fuel spray into the lower end of the combustion chamber, said chamber increasing in size in the direction of `the entering fuel. As the chamber increases in height from the iront to the rear, ample space is provided For the con'lbustion of the mixture of atoniized oil andair, and a travel of sutlicient length to insure that the combustion shall be completed before the gases reach the generating surfaces. Yl'i`urthermore the large area ot heated brick work radiates By .this arrangement a high furnace temperature is established.

Fig. L shows an ,arrangement for a superheater boiler. in this form the baille '15 extends from drum 'l to thc stack outlet l1 above the bank oi tubes to provide, space suiiicient to accommodate a superheater 1G above the first and second passes. The inner wall of the flue outlet serves as an upward extension of cross baiile 10.

lVhat l claim and desire to secure by Letters Patent of the United States is:-

1. A steam boiler ot' the class described having a bank of inclined tubes, drums into which said tubes are expandcdMsaid tubes being curved at both ends and straight tor the rest of their length and entering the drums radially, and downcomers at the side of the bank and expanded into said drums.

9.. A steam boiler oi the class described having a bank ot inclined tubes. drums into which said tubes are expanded, said tubes being curved at both ends and straight for the rest of their length and entering the drums radially, downcomers at the side of the bank and expanded into said drums, a longitudinal' baffle to direct the gases to the uptake ends of the tubes` and cross battles across the straight portions of the tubes.

3. A steam boiler ot the class described having a bank of inclined tubes, drums into which said tubes are expanded, said tubes bein;r curved at both ends and straight forthe rest of' their length and entering the drums radially, downcomersat the side of the bank and expanded into said drums, longitudinal bafiies extending from said'drums, and transverse battles from the ends of the longitudinal baiiies extending across the straight portions ot' the tubes.

4e. A steam boiler of the class described, comprisingl a transverse mud drum at the front of the setting and above the inlet for fuel, an elevated transverse steam and water drinn at the rear of the setting, a bank of rearwardly and upwardly inclined water tubes expanded into the drums and connectmg them,l said tubes being curved at both ends and straight for the major portion of their lengthand entering the drums on substantially radial lines, a combustion chamber extending beneath the major portion of the length of the tubes, a horizontal baiile extending rear ardly and upwardly from the mud drum and giving a combustion chamber which enlarges rearwardly, transverse batiies arranged to give the gases up and down passes and an oil'take tine over the mud drum and leading from the last up* pass of the gases.

5. steam boiler of the class described having a bank of inclined'tubes, drums into which said tubes are expanded, said tubes being curved at both ends and straight for the rest ot-their length and enter-ing the drums radially, and downcomers located in the, side walls of thesctting and expanded into said drums having the same general inclination to thehorizon'tal as the generating tubes. i

(S. In a steam boiler of the class described, the combination of abank ot inclined generating tubes, drums intov lwhich the tubes are expanded, battles ,extending from said drums, cross baiiies from the ends of the lirst-named battles, and downcoiners on each side of the bank of tubes and expanded into lsaid drums. y l. r 7. A steam boiler of the class described liavinga bank of tubes inclined upward from the trout ot' the setting to provide a combustion space increasing in Asize toward the rear, drums into'which said tubes are expanded, batlies extending from said drums, cross baiiles from'the ends of the first-named battles, a superheater 'in the space between the tubes and the baille extending from `the steam drum, and downcomers on each side 'of the bank of tubes and expanded into said drums.

In testimony whereof have hereunto signed my name in the presence of two suby scribing witnesses.

WILLl-AM D. HOXIE.

Witnesses:

EDITH CAMP, A. J. KLAS. 

